Gday everyone.... I am building an Austin Healey replica. Here is the problem I don't have enough room for the radiator (from the donor car ford sierra) if I mount it vertically. So my question is how far off vertical can I go that it will still function properly? I am using a v6 motor... the other possibility is to try a smaller radiator but how can I calculate the size of radiator i need to cool the engine. I also need to know the importance of relationship with the lower radiator outlet of the radiator to the water pump (the water pump is on the water input to the motor)